You can generate loan offer signatures from a smart contract instead of a wallet.

Here is a simple how-to:

  1. Write your own smart contract and implement the signature validation method of EIP-1271:
    - isValidSignature(bytes32 hash,bytes memory _signature) public view override returns (bytes4)

  2. Implement the following methods in your smart contract

  // Approve for the x2y2 lending contract
  - approveERC20
  - approveERC721
  - approveAllERC721
  // Withdraw assets
  - withdrawETH 
  - withdrawERC20
  - withdrawERC721
  - withdrawERC1155
  1. When making calls to the Make new offer endpoint, set your contract address as lender.